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Music is more than just notes, and books are more than just words. More than just paper, embossed binding or glossy illustrations. This is what Rintaro, a high school student, realises when he sets out to save books in a magical labyrinth. The boy doesn't look like a superhero: he's aloof, pale, thin, and wears thick glasses. But he has one superpower: a sincere love of books. He also has a strange companion, a cat named Tigger, who has a straightforward grunt and sometimes quotes The Little Prince. Together they carry out three rescue missions. Saving books in the twenty-first century? From whom? From people who chase quantity, kill individuality for the sake of simplification, and publish information junk while literary diamonds gather dust.

This is a touching story about the power of reading, book worlds, love, values, the search for identity, and newfound courage.